Boot from live usb. I use Debian 8. Open terminal and type sudo su Install LVM apt-get install lvm2 List all logical volumes in all volume groups lvscan I have such a LVM structure ACTIVE '/dev/v1/boot' [100.00 MiB] inherit ACTIVE '/dev/v1/root' [10.00 GiB] inherit ACTIVE '/dev/v1/tmp' [500.00 MiB] inherit ACTIVE '/dev/v1/var' [30.00 GiB] inherit Now mount devices to mnt folder mount...

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